Hello, I have a strange problem inside my Xen DomU. Inside my domU, I have a tool running (lookbusy) that generates a certain amount of cpu load. Let''s say, I generate 50% of CPU load on 1 core. When I check the cpu load with top, I get something strange. Here''s the output from top: top - 11:36:06 up 52 min, 1 user, load average: 0.54, 0.52, 0.46 Tasks: 68 total, 2 running, 66 sleeping, 0 stopped, 0 zombie Cpu0 : 0.0%us, 0.0%sy, 0.0%ni, 99.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.2%st Cpu1 : 34.0%us, 0.2%sy, 0.0%ni, 65.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 262468k total, 32896k used, 229572k free, 0k buffers Swap: 0k total, 0k used, 0k free, 10092k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1384 root 20 0 1800 492 384 R 52 0.2 26:11.09 lookbusy So, inside the detailed list, I see a CPU load of 52% (which is indeed more or less what I expect), but at the summary on the top of the output, I see the CPU1 is 65.8% idle or thus only 34.2% loaded. If I look with xen top from Domain-0, I see more or less 50%. I also tried some other tools: 1) with ps: I see the 52% load 2) with vmstat: I get the 34.2% load Is there anyone who has an idea what could cause this difference? Which tool should I believe? Here is my configuration: hypervisor: Xen 3.4.0 Domain 0: 2.6.26-2-xen-686 image from Lenny distribution Domain U: minimal version of a 2.6.26-kernel for xen domU (lenny). Hardware: 4 cores in total, in the example described above, I had 1 cpu core pinned for Domain-0 and 2 cpu cores pinned for the DomU. Kind regards, Lien _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hello, I have a strange problem inside my Xen DomU. Inside my domU, I have a tool running (lookbusy) that generates a certain amount of cpu load. Let''s say, I generate 50% of CPU load on 1 core. When I check the cpu load with top, I get something strange. Here''s the output from top: top - 11:36:06 up 52 min, 1 user, load average: 0.54, 0.52, 0.46 Tasks: 68 total, 2 running, 66 sleeping, 0 stopped, 0 zombie Cpu0 : 0.0%us, 0.0%sy, 0.0%ni, 99.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.2%st Cpu1 : 34.0%us, 0.2%sy, 0.0%ni, 65.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 262468k total, 32896k used, 229572k free, 0k buffers Swap: 0k total, 0k used, 0k free, 10092k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1384 root 20 0 1800 492 384 R 52 0.2 26:11.09 lookbusy So, inside the detailed list, I see a CPU load of 52% (which is indeed more or less what I expect), but at the summary on the top of the output, I see the CPU1 is 65.8% idle or thus only 34.2% loaded. If I look with xen top from Domain-0, I see more or less 50%. I also tried some other tools: 1) with ps: I see the 52% load 2) with vmstat: I get the 34.2% load Is there anyone who has an idea what could cause this difference? Which tool should I believe? Here is my configuration: hypervisor: Xen 3.4.0 Domain 0: 2.6.26-2-xen-686 image from Lenny distribution Domain U: minimal version of a 2.6.26-kernel for xen domU (lenny). Hardware: 4 cores in total, in the example described above, I had 1 cpu core pinned for Domain-0 and 2 cpu cores pinned for the DomU. Kind regards, Lien _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users